>> reporter: all at the ripe old age of 22. >> welcome to nashville. >> thank you. >> reporter: when i caught up with taylor swift, she was in the middle of shooting her third cover for "glamour" magazine. >> i would wear anything that they asked me to, really. >> you're very compliant. >> yeah. >> for a person who has -- you are also very organized. >> you pick your battles, you know? >> is that what it is? >> it's like, fighting with me on top, that's not a hill i want to die on, you know? >> reporter: her public persona is one of innocence. and sweetness. and inside, accomplished professional and somewhat giddy kid. >> and this is my favorite thing. >> oh, i love those. those are the two things. the real taylor twist? >> i'm for real going to steal them. >> you are? >> reporter: she also may be the most successful singer/songwriter of her generation. you're the number one earning star 30 years old or younger. beating justin bieber. >> oh, yeah, someone told me that. >> reporter: rihanna. reportedly $56 million last year. >> that's a lot. >> does it feel a little intimidating somet